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Nonpension Postretirement Benefits (Tables)
 12 Months Ended
Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]  
Weighted Average Assumed Health Care Cost Trend Rates
The weighted average assumed health care cost trend rates at December 31 were as follows:
 
U.S. Plans
 
Non-U.S. Plans
 
2016
 
2015
 
2016
 
2015
Health care cost trend rate assumed for next year
6.75
%
 
7.00
%
 
6.75
%
 
7.00
%
Ultimate health care trend rate
5.00
%
 
5.00
%
 
5.00
%
 
5.00
%
Year the ultimate trend rate is reached
2024

 
2024

 
2024

 
2024
Components of Nonpension Postretirement Benefit Obligation
The components of our nonpension postretirement benefit obligation are as follows:
Year ended December 31,
(dollars in thousands)
 
U.S. Plans
 
Non-U.S. Plans
 
Total
 
2016
 
2015
 
2016
 
2015
 
2016
 
2015
Change in accumulated nonpension postretirement benefit obligation:
 
 
 
 
 
 
 
 
 
 
 
 
Benefit obligation, beginning of year
 
$
58,795

 
$
65,565

 
$
1,390

 
$
2,536

 
$
60,185

 
$
68,101

Service Cost
 
797

 
855

 
1

 
1

 
798

 
856

Interest cost
 
2,608

 
2,537

 
51

 
52

 
2,659

 
2,589

Plan participants' contributions
 
528

 
610

 
—

 
—

 
528

 
610

Actuarial (gain) loss
 
146

 
(7,287
)
 
(102
)
 
(740
)
 
44

 
(8,027
)
Exchange rate fluctuations
 
—

 
—

 
46

 
(346
)
 
46

 
(346
)
Benefits paid
 
(3,953
)
 
(3,485
)
 
(42
)
 
(113
)
 
(3,995
)
 
(3,598
)
Benefit obligation, end of year
 
$
58,921

 
$
58,795

 
$
1,344

 
$
1,390

 
$
60,265

 
$
60,185

 
 
 
 
 
 
 
 
 
 
 
 
 
Funded status and accrued benefit cost
 
$
(58,921
)
 
$
(58,795
)
 
$
(1,344
)
 
$
(1,390
)
 
$
(60,265
)
 
$
(60,185
)
Nonpension Postretirement Benefit Plans  
Defined Benefit Plan Disclosure [Line Items]  
Components of Net Benefit Costs
The provision for our nonpension postretirement benefit expense consists of the following:
Year ended December 31,
(dollars in thousands)
 
U.S. Plans
 
Non-U.S. Plans
 
Total
 
2016
 
2015
 
2014
 
2016
 
2015
 
2014
 
2016
 
2015
 
2014
Service cost (benefits earned during the period)
 
$
797

 
$
855

 
$
1,007

 
$
1

 
$
1

 
$
1

 
$
798

 
$
856

 
$
1,008

Interest cost on projected benefit obligation
 
2,608

 
2,537

 
2,840

 
51

 
52

 
108

 
2,659

 
2,589

 
2,948

Amortization of unrecognized:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Prior service cost
 
140

 
140

 
140

 
—

 
—

 
—

 
140

 
140

 
140

Loss (gain)
 
81

 
592

 
267

 
(47
)
 
(56
)
 
—

 
34

 
536

 
267

Nonpension postretirement benefit expense
 
$
3,626

 
$
4,124

 
$
4,254

 
$
5

 
$
(3
)
 
$
109

 
$
3,631

 
$
4,121

 
$
4,363
Schedule of Assumptions Used
The discount rates used to determine the accumulated postretirement benefit obligation and net postretirement benefit cost were as follows:
 
U.S. Plans
 
Non-U.S. Plans
 
2016
 
2015
 
2014
 
2016
 
2015
 
2014
Accumulated postretirement benefit obligation
4.05
%
 
4.56
%
 
4.10
%
 
3.48
%
 
3.69
%
 
3.61
%
Net postretirement benefit cost
4.56
%
 
4.10
%
 
4.74
%
 
3.69
%
 
3.61
%
 
4.36
%
Net Accrued Benefit Liability
The net accrued postretirement benefit liability at December 31 of the respective year-ends were included in the Consolidated Balance Sheets as follows:
December 31,
(dollars in thousands)
 
2016
 
2015
Current liability
 
$
4,892

 
$
4,903

Long-term liability
 
55,373

 
55,282

Total accrued postretirement benefit liability
 
$
60,265

 
$
60,185
Amounts Recognized in Accumulated Other Comprehensive Loss
The pretax amounts recognized in accumulated other comprehensive loss as of December 31, 2016 and 2015, are as follows:
Year ended December 31,
(dollars in thousands)
 
U.S. Plans
 
Non-U.S. Plans
 
Total
 
2016
 
2015
 
2016
 
2015
 
2016
 
2015
Net actuarial loss (gain)
 
$
5,146

 
$
5,080

 
$
(730
)
 
$
(654
)
 
$
4,416

 
$
4,426

Prior service cost (credit)
 
(1,463
)
 
(1,323
)
 
—

 
—

 
(1,463
)
 
(1,323
)
Total cost (credit)
 
$
3,683

 
$
3,757

 
$
(730
)
 
$
(654
)
 
$
2,953

 
$
3,103
Amounts in Accumulated Other Comprehensive Loss to be Recognized During 2017
The pretax amounts in accumulated other comprehensive loss at December 31, 2016, that are expected to be recognized as components of net periodic benefit cost during 2017 are as follows:
(dollars in thousands)
 
U.S. Plans
 
Non-U.S. Plans
 
Total
Net actuarial loss (gain)
 
$
101

 
$
(54
)
 
$
47

Prior service cost (credit)
 
(200
)
 
—

 
(200
)
Total cost (credit)
 
$
(99
)
 
$
(54
)
 
$
(153
)
Anticipated Benefit Payments
Nonpension postretirement benefit payments net of estimated future Medicare Part D subsidy payments and future retiree contributions, are anticipated to be paid as follows:
Fiscal Year
(dollars in thousands)
 
U.S. Plans
 
Non-U.S. Plans
 
Total
2017
 
$
4,833

 
$
154

 
$
4,987

2018
 
$
4,951

 
$
153

 
$
5,104

2019
 
$
4,990

 
$
147

 
$
5,137

2020
 
$
4,872

 
$
141

 
$
5,013

2021
 
$
4,614

 
$
133

 
$
4,747

2022-2026
 
$
19,834

 
$
434

 
$
20,268